64106507191 has 4 divisors (see below), whose sum is σ = 64271305800. Its totient is φ = 63941708584.

The previous prime is 64106507149. The next prime is 64106507207. The reversal of 64106507191 is 19170560146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64106507191 - 2¹¹ = 64106505143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64106507111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82398721 + ... + 82399498.

It is an arithmetic number, because the mean of its divisors is an integer number (16067826450).

Almost surely, 2^64106507191 is an apocalyptic number.

64106507191 is a deficient number, since it is larger than the sum of its proper divisors (164798609).

64106507191 is a wasteful number, since it uses less digits than its factorization.

64106507191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164798608.

The product of its (nonzero) digits is 45360, while the sum is 40.

The spelling of 64106507191 in words is "sixty-four billion, one hundred six million, five hundred seven thousand, one hundred ninety-one".